Bulgakite (original) (raw)

A valid IMA mineral species

Formula:

Li2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2

Specific Gravity:

3.30 - 3.326

Name:

Named after Lev Vasil'evich Bulgak (Лев Васильевич Булгак) (b. 1955), Russian mineralogist, gemologist, and discoverer of several new minerals. He worked at the A. E. Fersman Mineralogical Museum (1975-2003).

Unique IdentifiersHide

This section is currently hidden. Click the show button to view.

Long-form identifier:

mindat:1:1:46415:2

b67f47bc-b09f-4011-ae4c-362412e3da5d

IMA Classification of BulgakiteHide

This section is currently hidden. Click the show button to view.

IMA Formula:

Li2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(O,F)(H2O)2

Type description reference:

Agakhanov, Atali A., Pautov, Leonid A., Sokolova, Elena, Abdu, Yassir A., Karpenko, Vladimir Y. (2016) Two Astrophyllite-Supergroup Minerals: Bulgakite, A New Mineral From the Darai-Pioz Alkaline Massif, Tajikistan and Revision of the Crystal Structure and Chemical Formula of Nalivkinite. The Canadian Mineralogist, 54 (1) 33-48 doi:10.3749/canmin.1500085

Classification of BulgakiteHide

This section is currently hidden. Click the show button to view.

9.DC.

9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12

Mineral SymbolsHide

This section is currently hidden. Click the show button to view.

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Physical Properties of BulgakiteHide

This section is currently hidden. Click the show button to view.

Transparency:

Transparent, Translucent

Hardness:

VHN100=204 - Vickers

Cleavage:

Perfect
Perfect parallel to {001} and moderate parallel to {010}

Density:

3.30 - 3.326 g/cm3 (Measured) 3.326 g/cm3 (Calculated)

Optical Data of BulgakiteHide

This section is currently hidden. Click the show button to view.

RI values:

_n_α = 1.695(3) _n_β = 1.711(2) _n_γ = 1.750(3)

2V:

Measured: 70° (5), Calculated: 67°

δ = 0.055

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

X = intensive reddish brown, Y = light brown, Z = greenish
light brown

Chemistry of BulgakiteHide

This section is currently hidden. Click the show button to view.

Mindat Formula:

Li2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2

Crystallography of BulgakiteHide

This section is currently hidden. Click the show button to view.

Class (H-M):

1 - Pinacoidal

Cell Parameters:

a = 5.374(1) Å, b = 11.965(2) Å, c = 11.654(3) Å
α = 113.457(8)°, β = 94.533(8)°, γ = 103.084(10)°

Ratio:

a:b:c = 0.449 : 1 : 0.974

X-Ray Powder DiffractionHide

This section is currently hidden. Click the show button to view.

Powder Diffraction Data:

Comments:

From Type Description.

Geological EnvironmentHide

This section is currently hidden. Click the show button to view.

Type Occurrence of BulgakiteHide

This section is currently hidden. Click the show button to view.

Place of Conservation of Type Material:

Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4572/1

Geological Setting of Type Material:

Fenitized amphibole–quartz–feldspar rock from a glacial morraine

Associated Minerals at Type Locality:

Reference:

Agakhanov, A.A., Pautov, L.A., Sokolova, E., Abdu, Y.A., Karpenko, V.Y. (2016) Two Astrophyllite-Supergroup Minerals: Bulgakite, A New Mineral From the Darai-Pioz Alkaline Massif, Tajikistan and Revision of the Crystal Structure and Chemical Formula of Nalivkinite. The Canadian Mineralogist: 54: 33-48.

Synonyms of BulgakiteHide

This section is currently hidden. Click the show button to view.

Relationship of Bulgakite to other SpeciesHide

This section is currently hidden. Click the show button to view.

Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

This section is currently hidden. Click the show button to view.

Fluorescence of BulgakiteHide

This section is currently hidden. Click the show button to view.

Other InformationHide

This section is currently hidden. Click the show button to view.

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for BulgakiteHide

This section is currently hidden. Click the show button to view.

References for BulgakiteHide

This section is currently hidden. Click the show button to view.

Reference List:

Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC), CNMNC Newsletter No. 22. Mineralogical Magazine, 78 (5) 1241-1248 doi:10.1180/minmag.2014.078.5.10

Agakhanov, Atali A., Pautov, Leonid A., Sokolova, Elena, Abdu, Yassir A., Karpenko, Vladimir Y. (2016) Two Astrophyllite-Supergroup Minerals: Bulgakite, A New Mineral From the Darai-Pioz Alkaline Massif, Tajikistan and Revision of the Crystal Structure and Chemical Formula of Nalivkinite. The Canadian Mineralogist, 54 (1) 33-48 doi:10.3749/canmin.1500085

Localities for BulgakiteHide

This section is currently hidden. Click the show button to view.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

This section is currently hidden. Click the show button to view.

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.